I did fill the boiler according to user manual instructions and suggestions here and was always aware that the boiler needed to stay filled. The machine pulled about 15 shots, steamed half a dozen pitchers of milk, was back flushed, descaled, the full gamut all without incident. There was no problem until I moved her and used another outlet. if you read the early posts of this thread, you'll get the full story.

Frying the boiler from running it without water would NOT cause the pump to sound odd. The two are not related.

As mentioned presiouslty, there are just a few possibilities:1 - The pump's diode is burnt out, shorted, and the pump's function has turned from half-phase, AC electromagnet to a personal pleasure device (vibrator). 2 - The inlet hose to the pump is kinked or crimped which will not allow water to flow TO the pump3 - There is a clog or loose scale in the boiler which is clogging the outlet to the group. 4 - I just re-read the original post. You said, "The hot water switch brings the normal hum and water flows from the wand." Hot water is pumped out through the TOP of the boiler. Brew water is pumped through a smaller opening iirc. This would verify #3 above, and explain why hot water works but brew does not. Try this: Turn on the brew cycle, but open the hot water valve. If the pump is functioning then hot water will flow just as if you turned on the hot water switch.

4a - During the #4 test (brew cycle on and hot water valve open), if the sound of the pump is normal then there is a clog inside the boiler or in the brew path from the boiler to the group4b - If the sound is rattling (not normal) then the 3-way solenoid is likely the problem and that is where the noise is coming from.

Here is the electrical tester result. Not sure how well you can see the photo, but hot and neutral are reversed. This condition has never caused trouble with any other device or machine on the outlet, e.g. grinders, drip coffee, small pump espresso, lamps.

Symbols: = New Posts since your last visit = No New Posts since last visit = Newest post

Forum Rules:No profanity, illegal acts or personal attacks will be tolerated in these discussion boards.No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum.No SEO style postings will be tolerated. SEO related posts will result in immediate ban from CoffeeGeek.No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum.Who Can Read The Forum? Anyone can read posts in these discussion boards.Who Can Post New Topics? Any registered CoffeeGeek member can post new topics.Who Can Post Replies? Any registered CoffeeGeek member can post replies.Can Photos be posted? Anyone can post photos in their new topics or replies.Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts.Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.